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Stoichiometry

Stoichiometry. Coach Cox. What is Stoichiometry?. Stoichiometry is the study of the quantitative relationships between the amounts of reactants used and the products formed by a chemical reaction Stoichiometry is based on the Law of Conservation of Mass

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Stoichiometry

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  1. Stoichiometry Coach Cox

  2. What is Stoichiometry? • Stoichiometry is the study of the quantitative relationships between the amounts of reactants used and the products formed by a chemical reaction • Stoichiometry is based on the Law of Conservation of Mass • Mass of Reactants = Mass of Products

  3. What is stoichiometry used for? • Stoichiometry is used to tell chemists: • How much product will be produced • How much reactant is needed to make a product

  4. Stoichiometry and the Balanced Equation • Coefficients in a balanced chemical equation can tell us: • The # of individual particles: (atoms, molecules, or FUN) • The # of moles of particles • The mass of reactants and products (Found using the molar mass(MM) of the compounds)

  5. Example • Balance the Following Equation: ___ Fe(s) + ___ O2(g)___ Fe2O3(s)

  6. Example Answer • Balance the Following Equation: 4 Fe(s) + 3 O2(g) 2 Fe2O3(s)

  7. Fill in the Table Fill in the table below: ReactantsProducts Name: Iron + Oxygen  Iron (III) Oxide Formula: Fe + O2 Fe2O3 ___4__atoms of Fe + __3___ molecules O2 ___2__ formula units Fe2O __4___ moles Fe + ___3__ moles O2 __2___ moles Fe2O3 (55.845x4) _223.38_ grams Fe + (32x3) _96_ grams O2 (159.69x2)_319.38_ grams Fe2O3 _319.38___ grams reactants  _319.38__ grams products

  8. Mole Ratio (Coefficient Ratio) • Mole Ratio (coefficient ratio) – the ratio between the numbers of moles of any 2 substances in a balanced chemical equation • Ex. Balance the following equation and determineall mole ratios: • ____ N2(g) + ____ H2(g)  ____ NH3(g) • ____ Fe(s) + ____ H2O(l)  ____ Fe3O4(s) + ____ H2(g)

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